<!DOCTYPE html>
<HTML>
<HEAD><meta name="viewport" content="width=device-width, initial-scale=1">
<Title>Polar Scatter Chart</Title>
<link type='text/css' rel='Stylesheet' href="maxchartapi.css" />
</HEAD>
<body bgcolor="#FFFFFF" text="#000000" topmargin="0" leftmargin="0" rightmargin="0" marginwidth="0" marginheight="0">

<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1">Polar Scatter Chart</p>
<hr class="separator">
<div class="content">
<img src="images/polarscatter.png" width='460' height='460'>
<br><br>
This example demonstrates how to create polar scatter charts. It also demonstrates using alternating background colors along the angular direction.<br><br>
A polar scatter chart can be created as a polar line chart with data symbols. The line width is set to 0, so only the symbols can be seen. This will create the effects of a scatter chart.<br><br>
The detail steps are:<br><br>
<ul><li> Create a polar line layer using <a href="PolarChart.addLineLayer.htm">PolarChart.addLineLayer</a>.<br><br>
<li> Enable data symbols for the line using <a href="PolarLayer.setDataSymbol.htm">PolarLayer.setDataSymbol</a> (or <a href="PolarLayer.setDataSymbol2.htm">PolarLayer.setDataSymbol2</a> or <a href="PolarLayer.setDataSymbol3.htm">PolarLayer.setDataSymbol3</a> or <a href="PolarLayer.setDataSymbol4.htm">PolarLayer.setDataSymbol4</a>).<br><br>
<li> Disable the line by setting its width to 0 using <a href="PolarLayer.setLineWidth.htm">PolarLayer.setLineWidth</a>.</ul>
Note that in this example, the polar plot area uses two alternating background colors along the angular direction. This is by using <a href="PolarChart.setPlotAreaBg.htm">PolarChart.setPlotAreaBg</a>.
</div>
<p class="heading1a">Source Code Listing</p>
<div class="content">
<b>[JSP Version]</b> jspdemo/polarscatter.jsp
<div class='codeblock'><code class='pre'>&lt;%@page import="ChartDirector.*, java.util.*" %&gt;
&lt;%
// The data for the chart
double[] data0 = {43, 89, 76, 64, 48, 18, 92, 68, 44, 79, 71, 85};
double[] angles0 = {45, 96, 169, 258, 15, 30, 330, 260, 60, 75, 110, 140};

double[] data1 = {50, 91, 26, 29, 80, 53, 62, 87, 19, 40};
double[] angles1 = {230, 210, 240, 310, 179, 250, 244, 199, 89, 160};

double[] data2 = {88, 65, 76, 49, 80, 53};
double[] angles2 = {340, 310, 340, 210, 30, 300};

// The labels on the angular axis (spokes)
String[] labels = {"North", "North\nEast", "East", "South\nEast", "South", "South\nWest", "West",
    "North\nWest"};

// Create a PolarChart object of size 460 x 460 pixels
PolarChart c = new PolarChart(460, 460);

// Add a title to the chart at the top left corner using 15pt Arial Bold Italic font
c.addTitle2(Chart.TopLeft, "&lt;*underline=2*&gt;Plants in Wonderland", "Arial Bold Italic", 15);

// Set center of plot area at (230, 240) with radius 180 pixels
c.setPlotArea(230, 240, 180);

// Use alternative light grey/dark grey sector background color
c.setPlotAreaBg(0xdddddd, 0xeeeeee, false);

// Set the grid style to circular grid
c.setGridStyle(false);

// Add a legend box at the top right corner of the chart using 9pt Arial Bold font
c.addLegend(459, 0, true, "Arial Bold", 9).setAlignment(Chart.TopRight);

// Set angular axis as 0 - 360, either 8 spokes
c.angularAxis().setLinearScale2(0, 360, labels);

// Set the radial axis label format
c.radialAxis().setLabelFormat("{value} km");

// Add a blue (0xff) polar line layer to the chart using (data0, angle0)
PolarLineLayer layer0 = c.addLineLayer(data0, 0x0000ff, "Immortal Weed");
layer0.setAngles(angles0);

layer0.setLineWidth(0);
layer0.setDataSymbol(Chart.TriangleSymbol, 11);

// Add a red (0xff0000) polar line layer to the chart using (data1, angles1)
PolarLineLayer layer1 = c.addLineLayer(data1, 0xff0000, "Precious Flower");
layer1.setAngles(angles1);

// Disable the line by setting its width to 0, so only the symbols are visible
layer1.setLineWidth(0);

// Use a 11 pixel diamond data point symbol
layer1.setDataSymbol(Chart.DiamondSymbol, 11);

// Add a green (0x00ff00) polar line layer to the chart using (data2, angles2)
PolarLineLayer layer2 = c.addLineLayer(data2, 0x00ff00, "Magical Tree");
layer2.setAngles(angles2);

// Disable the line by setting its width to 0, so only the symbols are visible
layer2.setLineWidth(0);

// Use a 9 pixel square data point symbol
layer2.setDataSymbol(Chart.SquareSymbol, 9);

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "", "title='{dataSetName} at ({value} km, {angle} deg)'"));
%&gt;
&lt;!DOCTYPE html&gt;
&lt;html&gt;
&lt;head&gt;
    &lt;title&gt;Polar Scatter Chart&lt;/title&gt;
    &lt;!-- Include ChartDirector Javascript Library to support chart interactions --&gt;
    &lt;script type="text/javascript" src="cdjcv.js"&gt;&lt;/script&gt;
&lt;/head&gt;
&lt;body style="margin:5px 0px 0px 5px"&gt;
    &lt;div style="font:bold 18pt verdana;"&gt;
        Polar Scatter Chart
    &lt;/div&gt;
    &lt;hr style="border:solid 1px #000080; background:#000080" /&gt;
    &lt;div style="font:10pt verdana; margin-bottom:1.5em"&gt;
        &lt;a href="viewsource.jsp?file=&lt;%=request.getServletPath()%&gt;"&gt;View Source Code&lt;/a&gt;
    &lt;/div&gt;
    &lt;!-- ****** Here is the chart image ****** --&gt;
    &lt;%= viewer.renderHTML(response) %&gt;
&lt;/body&gt;
&lt;/html&gt;</code></div>
</div>
<br><hr class="separator"><div class="copyright">&copy; 2022 Advanced Software Engineering Limited. All rights reserved.</div>
</body>
</HTML>
